I have 500€ cent live account too. I'm not worried about useless nonsense backtests! Sorry.
Why 90% modeling quality in MT4 is only limitedly reliable
In short, an MT4 backtest with 90% modeling quality is only mederately reieable - it can show general tendencies but cannot be rusted for accurate performance predictions.
Here is why: 90% modeling quality does not use real tick data! At 90% MT4 uses interpolated ticks generated from M1 candles, not real tick-by-tick market data. These synthetic ticks don't reflect the true intrabar price movement.
This leads to several issues: spread inaccuracies because spread is often constant in MT4 backtests, while real spread fluctate.
No realistic slippage Order execution is unrealistically perfect.
Stop-loss and Take-profit execution inaccuracies
Without real ticks, MT4 can't accurately determine whether price truly hit a level intrabar.
Real-world frictions are missing entirely.
For good results you need: Tickstory, Tick Data Suite, Dukascopy tick data, TureTick/AlgoSeek (professional grade) for example
With 90% modeling quality, you can achieve fantastic results with many EA's, but in real trading you will only have maybe losses.
Some fraudulent EA developers even create EA's that achieve absolutely fantastic results in backtesting with 90% modeling quality, so that novice traders buy these EA's and only then realize that they are simply garbage.
DON'T TRUST ANY RESULTS WITHOUT AT LEAST 99% MODELING QUALITY! When you see 90% or "not available" instead of 99%-99.9% RUN AWAY, DON'T BUY THIS SHIT!